One-component adhesive compositions
US11667821B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2021 |
| Grant date | Jun 6, 2023 |
| Priority date | — |
| Expiry date | Jul 4, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G59/62
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
One-component (1K) adhesive compositions (“PEEP” compositions) and a process for making them are disclosed. A polyepoxide is reacted with a polyether polyol composition, a polyester polyol composition, or both in the presence of a heat-activated Lewis acid catalyst at a temperature within the range of 100° C. to 220° C. for a time effective to cure the adhesive. The compositions are storage-stable under ambient conditions. Compared with conventional epoxy compositions, the 1K PEEP compositions offer improved room temperature lap shear strength, better resilience, and higher elongation. The 1K PEEP systems deliver a desirable balance of physical and mechanical properties while avoiding polyisocyanates and polyamine crosslinkers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.